/*
 * DateTransform.java May 2007
 *
 * Copyright (C) 2007, Niall Gallagher <niallg@users.sf.net>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package wx.xml.simpleframework.xml.transform;

import java.lang.reflect.Constructor;
import java.util.Date;

/**
 * The <code>DateFactory</code> object is used to create instances
 * or subclasses of the <code>Date</code> object. This will create
 * the instances of the date objects using a constructor that takes
 * a single <code>long</code> parameter value.
 *
 * @author Niall Gallagher
 * @see wx.xml.simpleframework.xml.transform.DateTransform
 */
class DateFactory<T extends Date> {

    /**
     * This is used to create instances of the date object required.
     */
    private final Constructor<T> factory;

    /**
     * Constructor for the <code>DateFactory</code> object. This is
     * used to create instances of the specified type. All objects
     * created by this instance must take a single long parameter.
     *
     * @param type this is the date implementation to be created
     */
    public DateFactory(Class<T> type) throws Exception {
        this(type, long.class);
    }

    /**
     * Constructor for the <code>DateFactory</code> object. This is
     * used to create instances of the specified type. All objects
     * created by this instance must take the specified parameter.
     *
     * @param type this is the date implementation to be created
     * @param list is basically the list of accepted parameters
     */
    public DateFactory(Class<T> type, Class... list) throws Exception {
        this.factory = type.getDeclaredConstructor(list);
    }

    /**
     * This is used to create instances of the date using a delegate
     * date. A <code>long</code> parameter is extracted from the
     * given date an used to instantiate a date of the required type.
     *
     * @param list this is the type used to provide the long value
     * @return this returns an instance of the required date type
     */
    public T getInstance(Object... list) throws Exception {
        return factory.newInstance(list);
    }
}